3.Good smooth and high strength4. Diameter from 1mm to 120mm,Length from 100mm to 2000mm, multi bores tubes can be made.5. Max working temperature 1800.6. Out surface can be grinded drilling hole to make tight tolerance and right instillation.7.Large quantity in stock makes fast delivery and competitive prices.8.OEM and ODM are welcomedMain performance index about alumina ceramic tube: